287 



1441. The opposite half of the same vertebra, transversely bisected. 



Hunterian. 



Genus Zeuglodon. 



1442. Sections of a rib of the Zeuglodon cetoides, Owen. It presents a compact 



osseous structure with excentric layers of growth. 



From the tertiary deposits of the State of Alabama, North America. 



Presented by Dr. Richard Harlan. 



1443. An anterior caudal vertebra of the Zeuglodon cetoides. It measures eight 



inches and a half in longitudinal diameter and seven inches in transverse 

 diameter : the base of the neural arch, which is five inches in extent, is 

 situated nearer the anterior than the posterior part of the vertebra. 

 From the tertiary deposits of the State of Alabama, North America. 



Purchased. 



1444. A posterior caudal vertebra of the Zeuglodon cetoides. 



From the tertiary deposits of Alabama, North America. 



Purchased. 



Genus Physeter. 



1445. The tooth of a Cachalot {Physeter macrocephalus) : it has lost most of 



the original animal matter and is partly decomposed into successive 

 layers. 



From the newer pliocene strata in South America. 



Presented by Charles Darwin, Esq., F.R.S. 



1445 1 . The tooth of a recent Cachalot, for comparison. Purchased. 



Genus Balmna. 



1446. The caudal vertebra of a Whale {Balce?ia mysticetus?) with the trans- 



verse processes broken away : it measures nine inches in longitudinal 

 diameter, and twelve inches in transverse diameter : the articular epiphy- 

 sial plates are anchylosed to the body. 



From the gravel in the old bed of the Thames ; found thirty feet 

 below the surface in excavations near the Temple Church. 



Purchased. 



